<template>
  <div class="custom-loading" v-if="show">
    <div class="animation">
      <span class="girl"></span>
      <div class="boys">
        <span></span>
        <span></span>
        <span></span>
        <span></span>
      </div>
    </div>
  </div>
</template>

<script>
  export default {
    name: "CustomLoading",
    props:{
      show:{
        default: false,
        type: Boolean
      }
    }
  }
</script>

<style lang="less" scoped>
  .custom-loading{
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: rgba(255,255,255,0.7)
  }
  .animation {
    width: 8em;
    height: 1em;
    font-size: 35px;
    display: flex;
    justify-content: space-between;
  }

  .animation span {
    width: 1em;
    height: 1em;
    --duration: 1.5s;
  }

  .girl {
    animation: slide var(--duration) ease-in-out infinite alternate;
  }

  @keyframes slide {
    from {
      transform: translateX(0);
      filter: brightness(1);
    }
    to {
      transform: translatex(calc(8em - (1em * 1.25)));
      filter: brightness(1.45);
    }
  }

  .boys {
    width: 6em;
    display: flex;
    justify-content: space-between;
  }

  .boys span {
    animation: var(--duration) ease-in-out infinite alternate;
  }

  .boys span:nth-child(1) {
    animation-name: jump-off-1;
  }

  .boys span:nth-child(2) {
    animation-name: jump-off-2;
  }

  .boys span:nth-child(3) {
    animation-name: jump-off-3;
  }

  .boys span:nth-child(4) {
    animation-name: jump-off-4;
  }

  @keyframes jump-off-1 {
    0%, 15% {
      transform: rotate(0deg);
    }
    35%, 100% {
      transform-origin: -50% center;
      transform: rotate(-180deg);
    }
  }

  @keyframes jump-off-2 {
    0%, 30% {
      transform: rotate(0deg);
    }
    50%, 100% {
      transform-origin: -50% center;
      transform: rotate(-180deg);
    }
  }

  @keyframes jump-off-3 {
    0%, 45% {
      transform: rotate(0deg);
    }
    65%, 100% {
      transform-origin: -50% center;
      transform: rotate(-180deg);
    }
  }

  @keyframes jump-off-4 {
    0%, 60% {
      transform: rotate(0deg);
    }
    80%, 100% {
      transform-origin: -50% center;
      transform: rotate(-180deg);
    }
  }

  .animation span::before {
    content: '';
    position: absolute;
    width: inherit;
    height: inherit;
    border-radius: 15%;
    box-shadow: 0 0 0.1em rgba(0, 0, 0, 0.3);
  }

  .girl::before {
    background-color: @primaryColor;
  }

  .boys span::before {
    background-color: @blackColor;
    animation: var(--duration) ease-in-out infinite alternate;
  }

  .boys span:nth-child(1)::before {
    filter: brightness(1);
    animation-name: jump-down-1;
  }

  .boys span:nth-child(2)::before {
    filter: brightness(1.15);
    animation-name: jump-down-2;
  }

  .boys span:nth-child(3)::before {
    filter: brightness(1.3);
    animation-name: jump-down-3;
  }

  .boys span:nth-child(4)::before {
    filter: brightness(1.45);
    animation-name: jump-down-4;
  }

  @keyframes jump-down-1 {
    5% {
      transform: scale(1, 1);
    }
    15% {
      transform-origin: center bottom;
      transform: scale(1.3, 0.7);
    }
    20%, 25% {
      transform-origin: center bottom;
      transform: scale(0.8, 1.4);
    }
    40% {
      transform-origin: center top;
      transform: scale(1.3, 0.7);
    }
    55%, 100% {
      transform: scale(1, 1);
    }
  }

  @keyframes jump-down-2 {
    20% {
      transform: scale(1, 1);
    }
    30% {
      transform-origin: center bottom;
      transform: scale(1.3, 0.7);
    }
    35%, 40% {
      transform-origin: center bottom;
      transform: scale(0.8, 1.4);
    }
    55% {
      transform-origin: center top;
      transform: scale(1.3, 0.7);
    }
    70%, 100% {
      transform: scale(1, 1);
    }
  }

  @keyframes jump-down-3 {
    35% {
      transform: scale(1, 1);
    }
    45% {
      transform-origin: center bottom;
      transform: scale(1.3, 0.7);
    }
    50%, 55% {
      transform-origin: center bottom;
      transform: scale(0.8, 1.4);
    }
    70% {
      transform-origin: center top;
      transform: scale(1.3, 0.7);
    }
    85%, 100% {
      transform: scale(1, 1);
    }
  }

  @keyframes jump-down-4 {
    50% {
      transform: scale(1, 1);
    }
    60% {
      transform-origin: center bottom;
      transform: scale(1.3, 0.7);
    }
    65%, 70% {
      transform-origin: center bottom;
      transform: scale(0.8, 1.4);
    }
    85% {
      transform-origin: center top;
      transform: scale(1.3, 0.7);
    }
    100%, 100% {
      transform: scale(1, 1);
    }
  }
</style>